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neels has posted comments on this change. ( https://gerrit.osmocom.org/c/libosmocore/+/36669?usp=email )

Change subject: gsm0808: add knowledge of TW-TS-003 BSSMAP IE ......................................................................

Patch Set 3:

(1 comment)

Patchset:

PS3: I'm in two minds here; this seems to be a single person effort. On the one hand, an open community wants to allow open use, but on the other hand there are bounds to what amount of API we can hope to maintain.

I find this curious description of apparently a single person, I suspect the author of this patch =)

"under the authority of the Presiding Sisterhood (government) of the Women's Republic of Themyscira as part of Themyscira Wireless technical initiative."

in https://www.freecalypso.org/specs/tw-ts-001-v010100.txt

This stuff puts me off -- I want to quickly understand what things are about, and adding noise around the core idea, like mimicking the kludgy phrases often found in 3GPP TS, adding glossaries and whimsical prose doesn't help in that regard...

In general I'm critical to "RTP extension". RTP is maximally flexible by allowing *any* payload types to be used, even if they are pure fantasy.

Adding custom IEs to RSL is done in osmcom, and its use is managed by the BTS features, seems this patch set is using that properly indeed.

Adding custom IEs to BSSMAP is not done in osmocom yet, and we have no way of indicating the BSS' custom capabilities to osmo-msc. How do you solve that?

BTW, if we have custom BSSMAP IEs, then I might want to add an IE to use an array of octets to describe all permitted AMR bitrates in a sane way (re: the AMR talk at osmodevcon '24: BSSMAP is a bottleneck in AMR rates negotiation).

But there are ample reasons to not deviate from 3GPP if at all possible. Every time we add custom stuff, we need to support, test and maintain both the 3GPP compliant as well as the custom stuff for all eternity...

Me personally, I'm a bit reluctant here, because I'm not familiar with the extensions. I would need a good TL;DR to start comprehending.